@function toRem($num) {
  @return $num/16+rem;
}

.header {
  background-color: rgb(57,58,63);
  height: 30vh;
  color: #ffffff;
  .avatar {
    width: 100%;
    img {
      height: 15vh;
      border-radius: 50%;
      margin: toRem(10) 0;
      border: 1px solid #fff;
      box-shadow: 0px 0px 20px #05060a;
    }
    .nickname {
      font-size: toRem(22);
    }
  }
}



